So here is my newest story and definitely the final version to my Trinity DxD story. I really botched up the stuff by adding too many stuff so I've separated things. Another DxD will focus on True Magic stuff and this story will focus strictly on DxD stuff as far as concepts goes. The main focus of this story will be Sacred Gears. I will warn you guys. I will never have Issei turn into a devil in any of my stories. He will either be a dragon or a human though most likely human. This story will be no different. The main pairing will be OC x Xenovia, like usual if you know me. Then again, this is still part of my attempt with Trinity DxD and I will never rest until I write the story proper. Shidou Haruka in this story will be Irina's real brother unlike in previous versions where he was adopted and is actually a Shijou. The story will start right at the start of DxD and will probably mostly focus on Haruka and Xenovia.

Disclaimer: the usual stuff about me not owning something.

Chapter 1: Sacred Gear

Sacred Gear, a weapon created by the God of the Bible for humans to use as a defense against the forces of supernatural. Everyone in the supernatural world knows what it is. They want it, they crave it. These powerful artifacts could tip the balance of the supernatural world just by existing. That is why the name of their forbidden move is Balance Breaker, those who breaks the balance.

Amongst all the numerous Sacred Gears, there are thirteen Sacred Gears that possesses the title of Longinus, sacred gears so powerful that they can kill Gods if used correctly. Telos Karma. Innovate Clear. Absolute Demise. Incinerate Anthem. Sepiroth Graal. Canis Lykaon. Regulus Nemea. Divine Dividing. Boosted Gear. Dimension Lost. Annihilation Maker. Zenith Tempest. And True Longinus. These are the names of the thirteen god-slaying weapons known to the supernatural world, each with fearsome power and reputation that makes even gods wary.

But where did Sacred Gears come from? It is well known that the Sacred Gears are created by God but no one, not even the Angels closest to God knew anything about its conception. They just suddenly exist. They are suddenly part of the system.

Nobody knows how Sacred Gears came to be. The only one who knows is God of the Bible… and the being sealed in the first ever Sacred Gear.

The lost Sacred Gear that became the prototype of all other Sacred Gears, Longinus number zero. Its existence lost in history as there has been no one who openly wields it in front of the supernatural factions. The strongest Sacred Gear simply because it is the first one. Nobody knows of its name apart from the wielder. Its name is...

-666's Seal-

Having sealed Trihexa using the majority of his power, God of the bible is weakened and tired. The strongest God in existence is on his knees after placing the last of Trihexa's seal.

"With this, I hope it is enough to keep the beast from rampaging and destroying the world."

Due to his love of the world and humanity, he dared seal The Beast right in the middle of the Great War despite knowing that he would be weakened and the chances of him dying increase. But that doesn't matter. The survival of the world and mankind is more important.

Thinking about mankind, God remembers about his other project. Project Sacred Gear. It is a secret project he conceived due to the chances of him dying in the Great War and humanity will be left defenseless against the forces of supernatural, not only the three factions but all other factions that exist in the world. Although he trusts Michael to look after his children, he is still but one Archangel. The Seraphs by themselves won't be able to protect humanity should he fall.

"So you have sealed that troublemaker."

A voice spoke to God of the Bible. It is a young girl around fourteen years old by looks alone with beautiful blonde hair that seems to glitter even in the dimensional gap.

"Eterna."

God spoke the name of the being that personifies the infinite possibility.

"I have put my thought on that matter you mentioned."

God became tense when she mentioned 'that' matter. He waits for her to give an answer.

"I accept."

God smiles. He knew that his project won't be able to happen in his current condition so he ask for the assistance of Eterna.

"Can I really experience it one day?"

She asks. God nods and gave her the brightest smile worthy of God of the Bible.

"I'm sure of it. One day, your wish will come true. All you need to do is wait and hope."

"Then I will believe you, God of the Bible. I shall help you create it, the Sacred Gear.

-Thousands of years later-

[You know, you can't really blame yourself forever.]

'I know. But I can't help it.'

[Don't try to always blame yourself for things that can't be helped. You're really similar to him you know.]

'Shut up.'

A nineteen years old young man with chestnut hair walks down the street of Kuoh as the sun sets. He wore a simple white shirt under a blue jacket and navy blue jeans. He looks to be carrying nothing but if one is connected to the supernatural world anyone could see that a katana is resting on the right side of his waist safely sheathed inside a crimson scabbard. His name is Shidou Haruka, a former exorcist from the Catholic Church. He wore a cross around his neck hidden under his clothes since he is in devil territory and it will be troublesome to have to explain to the devils that he is no longer involved with the church.

[So how does it feel to come back home to Kuoh after all this time?]

'Should be fun. I wonder how Issei is doing?'

Hyoudou Issei, a childhood friend of his when he was still living in Kuoh. The brown-haired boy is part of his younger sister's age group and was also a good friend of his. Irina and Issei used to look up to him who is older. Haruka fondly remember the days they spend causing trouble to their parents by staying out late.

[You know, I have a premonition that your return will trigger an interesting chain of events.]

'Don't jinx it Eterna. For all we know, you could be right and I will be involved in another convoluted scheme of a terrorist organization just because I'm in the wrong place in the wrong time. That happened before and it could happen again. At least this time I didn't pick up a school registration paper from a drunk youkai masquerading as a priest.'

It took Haruka a second to know that he is screwed when he heard the familiar sound of something stabbing through a person. Of course, that caught his full attention as he saw a fallen angel stabbing a boy a few years younger than him who is surprisingly familiar. Haruka groaned. There goes his peace for today.

[Ohh, it's Ddraig's user.]

'The Sekiryuutei? And did I just see a devil's summoning circle in his hand?'

[Standard Devil modus operandi, as usual. What do you want to do?]

"Fulfill your promise to God and what I swore to my predecessors."

Haruka voiced out his answer instead of communicating with Eterna through their link.

"I see that you've been having fun, fallen angel."

"Ohh, another human. How unlucky of you to be in the wrong place in the wrong time. Now I will have to kill you."

Haruka chuckled.

"What's so funny?"

"Try to come back when you have ten set of wings. Maybe then you will have a chance of defeating me."

Haruka didn't even bother to draw his sacred gear as numerous swords began to appear around him suspended in air.

"Perish, little fallen."

The fallen angel tried to create a spear but was too late. Haruka is an experienced exorcist, one of the best in fact that him quitting dealt a huge blow to the Catholic Church's reputation. He still wonders though why he is part of the Catholic Church when his sister is part of the Protestant Church. Against an opponent like Haruka who is also in possession of a powerful sacred gear which he didn't deign necessary to be used in this encounter, the fallen angel didn't even have enough time to react before she was skewered by almost a dozen blades which she realized are holy swords.

"Blade… Blacksmith…"

The last words she uttered was the name of the sacred gear that creates holy swords. Although his sacred gear is not the rare holy sword creator, he did use the sacred gear's capability. It is one of his sacred gear's powers which made it a very formidable gear although its true power is much more frightening but using it would paint a large target on him.

Haruka approached the dying boy to have a look at his face before proceeding with what he's about to do. His eyes almost bulged out at the familiar face. He would've cursed if he was not such a polite person but he settled with a simple groan and telling Eterna to hurry with the preparation.

"So now it is official. Our merry band of heroes are all involved in the supernatural world. How lucky can we be, Ise?"

[At least you have the right to make a sarcastic comment this time, Haru.]

Haruka draws his sacred gear and stab the blade to Issei's heart. Issei began to glow with golden light. Ddraig, the Red Dragon Emperor, felt the power that is entering his host and began to worry.

{So you have decided to show yourself again, Eterna. The world will surely change this time whether anyone wants it or not.}

So yeah, there's my take on the creation of Sacred Gears. I will probably go further with the story of how Sacred Gears came to be but that will be some chapters away. Also, Haruka might seem OP since he is OP but he will have problems against truly powerful opponents like Vali and the gang. When he actually use his sacred gear's real power, you will know that shit goes down. Here's what I have currently revealed about his sacred gear.

Classification: Longinus

Name: ?

Main Power: ?

Sub Power: copying the power of 4 other sacred gears (Blade Blacksmith)

So it has the power to copy 4 other sacred gears which means Haruka essentially have 5 sacred gears counting his own. One of his copied sacred gear is Blade Blacksmith and it is his favorite. He has one other copied gear and 2 empty slots. It is the Longinus 00's power as the first sacred gear and originator of all other gears. I put only 4 since too many will give me a headache when writing.

As for what Haruka's goal and what he did to Issei, wait for the next chapter. He obviously resurrected Issei but what else did he do? Follow and review since it is the source of my power and I will need more power to write.